﻿using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace Scoreboard.Controls
{
	public class ClipHelper
	{
		public static bool GetToBounds(DependencyObject depObj)
		{
			return (bool)depObj.GetValue(ToBoundsProperty);
		}

		public static void SetToBounds(DependencyObject depObj, bool clipToBounds)
		{
			depObj.SetValue(ToBoundsProperty, clipToBounds);
		}

		/// <summary>
		/// Identifies the ToBounds Dependency Property.
		/// <summary>
		public static readonly DependencyProperty ToBoundsProperty =
			DependencyProperty.RegisterAttached("ToBounds", typeof(bool),
			typeof(ClipHelper), new PropertyMetadata(false, OnToBoundsPropertyChanged));

		private static void OnToBoundsPropertyChanged(DependencyObject d,
			DependencyPropertyChangedEventArgs e)
		{
			FrameworkElement fe = d as FrameworkElement;
			if (fe != null)
			{
				ClipToBounds(fe);

				// whenever the element which this property is attached to is loaded
				// or re-sizes, we need to update its clipping geometry
				fe.Loaded += new RoutedEventHandler(fe_Loaded);
				fe.SizeChanged += new SizeChangedEventHandler(fe_SizeChanged);
			}
		}

		/// <summary>
		/// Creates a rectangular clipping geometry which matches the geometry of the
		/// passed element
		/// </summary>
		private static void ClipToBounds(FrameworkElement fe)
		{
			if (GetToBounds(fe))
			{
				fe.Clip = new RectangleGeometry()
				{
					Rect = new Rect(0, 0, fe.ActualWidth, fe.ActualHeight)
				};
			}
			else
			{
				fe.Clip = null;
			}
		}

		static void fe_SizeChanged(object sender, SizeChangedEventArgs e)
		{
			ClipToBounds(sender as FrameworkElement);
		}

		static void fe_Loaded(object sender, RoutedEventArgs e)
		{
			ClipToBounds(sender as FrameworkElement);
		}
	}
}
